linux-kernel - [PATCH] GPU-DRM-OMAP: Delete unnecessary checks before two function calls

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Message-ID: <72ff4670-4f3d-c7ed-4f37-e49f2bbc7aba@users.sourceforge.net>
Date:	Fri, 22 Jul 2016 08:45:23 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	dri-devel@...ts.freedesktop.org, Daniel Vetter <daniel@...ll.ch>,
	David Airlie <airlied@...ux.ie>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Tomi Valkeinen <tomi.valkeinen@...com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: [PATCH] GPU-DRM-OMAP: Delete unnecessary checks before two function
 calls

From: Markus Elfring <elfring@...rs.sourceforge.net>
Date: Fri, 22 Jul 2016 08:28:31 +0200

The following functions test whether their argument is NULL and then
return immediately.
* backlight_device_unregister
* drm_gem_object_unreference_unlocked

Thus the test around the calls is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
---
 drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c | 3 +--
 drivers/gpu/drm/omapdrm/omap_fb.c               | 4 ++--
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
index 1b0cf2d..0eae8af 100644
--- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
+++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c
@@ -1284,8 +1284,7 @@ static int dsicm_probe(struct platform_device *pdev)
 	return 0;
 
 err_sysfs_create:
-	if (bldev != NULL)
-		backlight_device_unregister(bldev);
+	backlight_device_unregister(bldev);
 err_bl:
 	destroy_workqueue(ddata->workqueue);
 err_reg:
diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
index 983c8cf..31f5178 100644
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -115,8 +115,8 @@ static void omap_framebuffer_destroy(struct drm_framebuffer *fb)
 
 	for (i = 0; i < n; i++) {
 		struct plane *plane = &omap_fb->planes[i];
-		if (plane->bo)
-			drm_gem_object_unreference_unlocked(plane->bo);
+
+		drm_gem_object_unreference_unlocked(plane->bo);
 	}
 
 	kfree(omap_fb);
-- 
2.9.2